Stormwater Sampling Services

Turnkey sampling support for industrial and construction stormwater permits, from field collection to reporting.

Field Sampling

Mobilization during qualifying events using calibrated equipment and proper chain-of-custody protocols.

Lab Coordination

Certified lab coordination for pH, TSS, O&G, nutrients, metals, and any permit-specific parameters.

Results Review

Interpretation of lab results, benchmark exceedance tracking, and corrective action recommendations.

Reporting & Documentation

Complete sampling and analysis reports with lab data, inspection logs, and summary evaluations.

Benchmark & Analyte Info

State-specific analyte and sector benchmark summaries for permit compliance.

Contact Our Team

Ready to set up sampling or request a quote?

Stormwater Sampling Hold Times

Typical maximum holding times for stormwater parameters:

pH: Analyze immediately onsite
TSS: 7 days
Oil & Grease: 28 days (preserved with HCl, cooled ≤6°C)
COD: 28 days (acid preserved)
BOD: 48 hours (cooled ≤6°C)
TKN, Nitrate/Nitrite, Phosphorus: 28 days (acid preserved)
Metals: 6 months (acid preserved)

Follow EPA 40 CFR Part 136 and state-specific method requirements.

How online data tools assist:

Capture at-sample metadata (date/time, sampler, GPS, photos) and field readings (pH/Temp/cond.).
Built-in prompts for preservatives/ice and holding-time countdowns to reduce qualification risk.
Auto-generate COC details (bottle IDs, preservation, custody entries) for report packets.
Prepares a clean record for lab EDD import and later DMR calculations.

Data Tools

Open 40 CFR Part 136 – Table II EPA Holding Time Guidance

Certified Lab Coordination

Pre-event staging: bottles, preservatives, labels, coolers, ice packs.
COC management: prefilled forms, barcode kits, signatures at handoff.
Courier & drop-off: chain-of-custody intact; temperature checks.
Lab method selection: permit-aligned methods (e.g., 160.2 TSS, 1664 O&G, 200.8 metals).
Turnaround options: standard and rush TAT with proactive status updates.

How online data tools assist:

Generate bottle kit checklists tied to analyte sets and sector/permit.
Track courier handoffs with timestamps, temperatures, and custody signatures.
Ingest lab EDDs (and PDFs) for error-checking, unit normalization, and ready-to-review datasets.
Retain a traceable audit trail for inspections and annual reporting.

Data Tools

EPA ECHO Facility Search ECHO Search Help

Coordinate My Lab

Results Review & Corrective Actions

QA/QC checks: holding times, preservation, qualifiers, duplicates, blanks.
Benchmark tracking: auto-compare to sector/state benchmarks; trend lines across events.
Exceedance response: root-cause analysis and BMP recommendations.
Regulatory outputs: language suitable for SWP3 updates and inspection logs.

How online data tools assist:

EDD import maps analytes, qualifiers, MDLs, and units to your standard set.
Auto-compare to benchmarks by sector/state and flag exceedances for CAP/BMP creation.
Produce trend visualizations and findings summaries for SARs and management reviews.
Stage a DMR-ready dataset (event stats, monthly averages, units) for submission.

Data Tools

Water Pollutant Loading Tool ECHO Tool Guide

Review My Results

Reporting & Documentation Deliverables

You’ll receive a clean, submission-ready package:

SAR PDF: summary narrative, site map, photos, weather & event details.
Lab packet: COC, certs, method sheets, and full analytical reports.
Data workbook: results table, flags, and rolling benchmark tracker.
SWP3 insert: concise update text and log entries for file retention.

How online data tools assist:

Compute loads (flow × concentration), daily values, and period averages for DMRs.
Export NetDMR-ready files and attachable SAR/COC packets for agency portals.
Maintain a complete audit trail from field notes to final submission.
Aligns narratives with MSGP/ISGP language for consistent submittals.

Data Tools

EPA 2021 MSGP Overview IDEM Industrial Stormwater (ISGP)

Request a Sample Report

Benchmark Values by State

Common stormwater benchmarks for Sector J (Mineral Mining and Dressing):

Indiana (ISGP): Nitrate+Nitrite-N (0.68 mg/L), Zinc (0.117 mg/L), Lead (0.0816 mg/L)
Ohio: Iron (1.0 mg/L), Nitrate-N (0.68 mg/L)
Kentucky: Iron (1.0 mg/L), Zinc (0.117 mg/L)
Michigan: Nitrate-N (0.68 mg/L), Iron (1.0 mg/L), Phosphorus (2.0 mg/L)
Missouri: Nitrate-N (0.68 mg/L), Zinc (0.117 mg/L)
Pennsylvania: Iron (1.0 mg/L), Aluminum (0.75 mg/L)
West Virginia: Nitrate-N (0.68 mg/L), Zinc (0.117 mg/L)
Texas: Iron (1.0 mg/L), Aluminum (0.75 mg/L)

Values vary by permit and sector—contact us for confirmation of your site-specific requirements.

How online data tools assist:

Keep benchmark libraries current by state/sector and apply them per location.
Map analytical methods to parameters to avoid unit/method mismatches.
Apply QC rules and exceedance flags automatically across events.
Feed a rolling tracker used in SARs and annual summaries.

Data Tools

Indiana ISGP Draft (benchmarks) IDEM ISGP Portal

Contact for State Info

Get in Touch

Tell us your permit type, site location(s), and the parameters you need. We’ll propose a simple, fixed-scope plan.

One-time event coverage or season packages
Rush lab turnaround available
Multi-site coordination

Heads-up: Our internal online tools are designed to capture sampling and flow data, compute loads, and stage NetDMR-ready files alongside SAR/COC packets.

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